1880

• Population of King County is 6,910

• First King County-owned courthouse at Third Avenue and Jefferson Street opens — the current site of City Hall Park.

• The Sheriff's department requests the National Guard's assistance in controlling Seattle mobs who were attempting to expel Chinese residents from the city.

• Eliza Forbes becomes the first female justice of the peace in King County.

• Washington enters the Union as the 42nd state on November 11, 1889.
• King County hires first full-time public health officer.

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